Apparatus for determining flange-pressures.



T. R. COOK & C. L. FISCHER.

APPARATUS FOR DETERMINING FLANGE PRESSURES.

APPLICATION FILED .IULYZO, 19M

Patented Mar. 20, 1917.

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WITNESSES M S INVENTORE T. R. COOK & C. L FISCHER.

APPARATUS FOR DETERMINING FLANGE PRESSURES.

APPLICATION FILED JULYZO. I914.

1,21 9,922. Patented Mar. 20, 1917.

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THOMAS E. COOK AND CHARLES L. FISCHER, 0F PITTSBURGH, PENNSYLVANIA.

APPARATUS FOR DETERMINING FLANGE-PRESSURE S.

Specification of Letters Patent. Patented B131. 20, 1917.

Application filed July 20, 1914. Serial No. 852,119.

To all whom it may concern Be it known that we, THOMAS R. Coox and CHARLES L. Fisonnn, both citizens of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Apparatus for Determining Flange-Pressures, of which the following is a specification.

The invention relates to testing apparatus for determining the pressures between the flanges of the wheels of cars and the heads of the rails upon which the wheels ride. The apparatus as hereinafter described is designed to be applied and operated at varying speeds over the roads, to ascertain the flange pressures under exact working conditions. preferably be used on experimental track with different types of rail heads and different contours of flanges to ascertain the .pressure in connection with different vertical loads which will cause a flange of a given contour to mount a rail head of a given contour. Certain embodiments of the preferred apparatus are illustrated in the accompanying drawings, wherein- Figure 1 is a transverse section through a truck equipped with our improved apparatus; and Fig. 2 is a side elevation of the track of Fig. 1.

Referring to Figs. 1 and 2; 1 is the body bolster upon which the car body 2 is mounted; 3 and 4 are the rails carrying the wheels 5 and 6 secured to the axle 7 in the usual way; 8 and 9 are the frame members secured to the body bolster; 10 and 11 are brasses mounted for movement longitudinally of the axle 7, and 12 and 18 are boxes carrying the said brasses.

Opposite the ends of the axle are the.

thrust bearing blocks 14 and 15, antifriction balls 16 being interposed between such 7 ends and the blocks. The parts are so proportioned that when the blocks 13 and 14 engage the brasses 10 and 12 the axle has a slight longitudinal play. Interposed between the ends of the boxes and the bearing blocks are the springs 17 and 18, the tension of which .is adjustable by means of the screws 19 and 20.

The boxes are slotted as indicated at 20 and 21, and arms 22 and 23 carried by the bearing blocks project upwardly therethrough. These arms are provided with fingers 24 and 25 adapted to register upon 7 The apparatus will the paper of indicating apparatus 26 and 27 which may be of any approved type. Suflicient space is provided between the wheels and boxes at 28 and 29 to permit of the lateral movement of the boxes with respect to the axles.

It will be readily understood that the foregoing apparatus is adapted to register the lateral pressure of the wheel flanges upon the heads of the rails. For instance when a force tends to move the car body 2 and bolster 1 to the left (Fig. 1) this force is transmitted to the frame 9 and thence to the box 18, tending to move it to the left. This movement compresses the spring 18 and pressure is transmitted through the bearing block 15, the axle 7 and the flange of the wheel 5, to the head of the rail 3. The extent of this movement depends upon the force, and this movement is registered on the apparatus 27 by reason of the arm 23 and finger 25. The extent of the force necessary to derail the car can be thus readily. determinedupon test. The apparatus at the other end of the axle similarly registers the force exerted between the flange of the wheel 6 and the rail 4: when the car body is moved to the right.

What We claim is- 1. The combination with an axle provided with a pair of flanged wheels, a truck carried by the axle and mounted for lateral movement with respect thereto, yielding means for restraining such movement, and

means for indicating the pressure exerted" by the truck as it moves laterally with respect to the axle. 7

2. The combination with an axle provided with a pair of flanged wheels, a truck carried by the axle and mounted for lateral movementwith respect to one of the wheels, yielding means for resisting '100 such movement, and means for indicating the pressure exerted by the truck in its tendency to move laterally. V

3. The combination with an axle provided with a pair of flanged wheels, a

4. The combination with an axle provided with a pair of flanged wheels, a truck carried by the axle and mounted for lateral movement with respect thereto, yielding means for restraining such move ment in both directions, and indicating means for showing the extent of the lateral movement in both directions.

5. The combination with an axle provided with a pair of flanged wheels, a truck carried by the axle, a bearing box carried by the truck and mounted on the axle for lateral movement, yielding means tending to prevent relative lateral movement of the box and axle, and means for indicating the extent of such movement.

6. The combination with an axle provided with a pair of flanged wheels, a truck carried by the axle, a bearing box carried by the truck and mounted on the axle for lateral movement, a thrust bearing and a spring between the box and the axle, and means for indicating the extent of such movement.

7. The combination with an axle provided with a pair of flanged wheels, a truck carried by the axle, a bearing box at each end of the axle mounted for movement therealong, a thrust bearing and a spring between each box and the end of the axle, and means for indicating the relative movement of each box with respect to the axle.

In testimony whereof we have hereunto signed our names in the presence of the two subscribed witnesses.

THOMAS R. COOK. CHAS. L. FISCHER. Witnesses:

JULIAN H. KENDIG, M. L. Jones.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

